Naked Quad
A Naked Quad is a Naked Subset of size 4.
It is formed by 4 cells that have candidates for only 4 digits and are collocated in the same house.
Example
The following example shows a Naked Quad in the middle box.
Sudoku Games
- Sudoku 9981
- Samurai Sudoku
- Sudoku2PDF Pro
- Sudoku2PDF
- Printable samurai sudoku
- Word Sudoku to Learn French (German , Spanish)
Sudoku strategies
- Coloring
- Singles
- Fish
- Chains and Loops
- Intersections
- Subsets
- Wings
- Single Digit Patterns
- Uniqueness
- Almost Locked Sets
